/**
 * Task Sync Sub-Domain — EngineResult-returning wrappers for external task sync.
 *
 * Provides taskSyncReconcile, taskSyncLinks, and taskSyncLinksRemove as
 * EngineResult-returning functions, moving this logic from task-engine.ts into
 * core/tasks/ per the T1566 engine-migration epic (ADR-057, ADR-058).
 *
 * @task T1568
 * @epic T1566
 * @adr ADR-057
 * @adr ADR-058
 */
import type { ExternalTask, ExternalTaskLink, ReconcileResult } from '@cleocode/contracts';
import { type EngineResult } from '../engine-result.js';
/**
 * Reconcile external tasks with CLEO as SSoT.
 *
 * @param projectRoot - Absolute path to the project root
 * @param params - Reconciliation parameters including provider ID and external tasks
 * @returns EngineResult with reconciliation results
 *
 * @task T1568
 * @epic T1566
 */
export declare function taskSyncReconcile(projectRoot: string, params: {
    providerId: string;
    externalTasks: ExternalTask[];
    dryRun?: boolean;
    conflictPolicy?: string;
    defaultPhase?: string;
    defaultLabels?: string[];
}): Promise<EngineResult<ReconcileResult>>;
/**
 * List external task links by provider or task ID.
 *
 * @param projectRoot - Absolute path to the project root
 * @param params - Optional provider ID or task ID filter
 * @returns EngineResult with links array and count
 *
 * @task T1568
 * @epic T1566
 */
export declare function taskSyncLinks(projectRoot: string, params?: {
    providerId?: string;
    taskId?: string;
}): Promise<EngineResult<{
    links: ExternalTaskLink[];
    count: number;
}>>;
/**
 * Remove all external task links for a provider.
 *
 * @param projectRoot - Absolute path to the project root
 * @param providerId - Provider ID whose links to remove
 * @returns EngineResult with count of removed links
 *
 * @task T1568
 * @epic T1566
 */
export declare function taskSyncLinksRemove(projectRoot: string, providerId: string): Promise<EngineResult<{
    providerId: string;
    removed: number;
}>>;
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